1. 判断。(是方程的打“√”,不是的打“×”。)
$0.5x = 40$ () $4x + 8$ ()
$76x - x < 99$ () $10 ÷ m = 2$ ()
$20 - 4 = 16$ () $4x = 0$ ()
$2x + 7 = x + 12$ () $23 + 6y = 540$ ()
$0.5x = 40$ () $4x + 8$ ()
$76x - x < 99$ () $10 ÷ m = 2$ ()
$20 - 4 = 16$ () $4x = 0$ ()
$2x + 7 = x + 12$ () $23 + 6y = 540$ ()
答案
$0.5x = 40$ (√)
$4x + 8$ (×)
$76x - x < 99$ (×)
$10 ÷ m = 2$ (√)
$20 - 4 = 16$ (×)
$4x = 0$ (√)
$2x + 7 = x + 12$ (√)
$23 + 6y = 540$ (√)
$4x + 8$ (×)
$76x - x < 99$ (×)
$10 ÷ m = 2$ (√)
$20 - 4 = 16$ (×)
$4x = 0$ (√)
$2x + 7 = x + 12$ (√)
$23 + 6y = 540$ (√)
2. 看图列方程。

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答案
$x + 20 = 60$
$4x = 100$
$3x + 15 = 60$
$2x + 10 = 65$
$25×2 + 2x = 150$
$x + 3.9 = 9.7$
$4x = 100$
$3x + 15 = 60$
$2x + 10 = 65$
$25×2 + 2x = 150$
$x + 3.9 = 9.7$
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